How much are you willing to spend? If you can find an AirPort Express (or a 2nd or 3rd generation AppleTV
), you can connect the 3.5 mm output from it to your PylePro for a wireless solution. A lower fidelity solution would be a Bluetooth receiver you would plug into your Amp, but that might have a distance limitation. Since this amplifier is 2x700 Watts, I am making the assumption that you’re intending to use it in a large space and may not have the MacBook Pro in close proximity to the amplifier.
If you want high-quality direct-connect audio, an AudioQuest DragonFly USB to 3.5 mm stereo dongle is going to give the cleanest audio possible from your Mac.